<template>
  <div v-if="easyFlowVisible" style="height: calc(100vh);">
    <el-row>
      <!--顶部工具菜单-->
      <el-col :span="24">
        <div class="ef-tooltar">
          
          <div style="float: right;margin-right: 5px">
            
            <el-button
              type="danger"
              plain
              round
              icon="el-icon-document"
              @click="$router.push({ path: '/workflow/list' })"
              size="mini"
              >返回</el-button
            >
            <!-- <el-button type="primary" plain round @click="dataReloadA" icon="el-icon-refresh" size="mini">切换流程A</el-button>
                        <el-button type="primary" plain round @click="dataReloadB" icon="el-icon-refresh" size="mini">切换流程B</el-button>
                        <el-button type="primary" plain round @click="dataReloadC" icon="el-icon-refresh" size="mini">切换流程C</el-button>
                        <el-button type="primary" plain round @click="dataReloadD" icon="el-icon-refresh" size="mini">自定义样式</el-button>
                        <el-button type="primary" plain round @click="dataReloadE" icon="el-icon-refresh" size="mini">力导图</el-button>
                        <el-button type="info" plain round icon="el-icon-document" @click="openHelp" size="mini">帮助</el-button> -->
          </div>
        </div>
      </el-col>
    </el-row>
    <div style="display: flex;height: calc(100% - 47px);">
      
      <div id="efContainer" ref="efContainer" class="container" v-flowDrag>
        <template v-for="node in data.nodeList">
          <flow-node
            :id="node.id"
            :key="node.id"
            :node="node"
            :activeElement="activeElement"
            @changeNodeSite="changeNodeSite"
            @nodeRightMenu="nodeRightMenu"
            @clickNode="clickNode"
          >
          </flow-node>
        </template>
        <!-- 给画布一个默认的宽度和高度 -->
        <div style="position:absolute;top: 2000px;left: 2000px;">&nbsp;</div>
      </div>

    </div>
    <!-- 流程数据详情 -->
    <flow-info v-if="flowInfoVisible" ref="flowInfo" :data="data"></flow-info>
    <flow-help v-if="flowHelpVisible" ref="flowHelp"></flow-help>
  </div>
</template>

<script>
import draggable from "vuedraggable";
// import { jsPlumb } from 'jsplumb'
// 使用修改后的jsplumb
import "./jsplumb";
import { easyFlowMixin } from "@/components/Workflow/mixins";
import flowNode from "@/components/Workflow/node";
import nodeMenu from "@/components/Workflow/node_menu";
import FlowInfo from "@/components/Workflow/info";
import FlowHelp from "@/components/Workflow/help";
import FlowNodeForm from "./node_form";
import lodash from "lodash";
import { getDataA } from "./data_A";
import { getDataB } from "./data_B";
import { getDataC } from "./data_C";
import { getDataD } from "./data_D";
import { getDataE } from "./data_E";
import { ForceDirected } from "./force-directed";

export default {
  props: {
    nodeData: {
      type: Object
    }
  },
  computed:{
      workflowName(){
          return this.$route.query.name
      }
  },
  data() {
    return {
      // jsPlumb 实例~
      jsPlumb: null,
      // 控制画布销毁
      easyFlowVisible: true,
      // 控制流程数据显示与隐藏
      flowInfoVisible: false,
      // 是否加载完毕标志位
      loadEasyFlowFinish: false,
      flowHelpVisible: false,
      // 数据
      data: {},
      // 激活的元素、可能是节点、可能是连线
      activeElement: {
        // 可选值 node 、line
        type: undefined,
        // 节点ID
        nodeId: undefined,
        // 连线ID
        sourceId: undefined,
        targetId: undefined
      },
      zoom: 0.5,
      //   nodeData: {
      //     name: "测试流程",
      //     nodeList: [
      //       {
      //         id: "d55745b5-e8f8-fea0-278c-ebc70fb71fa6",
      //         name: "开始",
      //         type: "Begin",
      //         left: "276px",
      //         top: "268px",
      //         ico: "el-icon-s-flag",
      //         state: "success",
      //         isWaitingAllUser: false,
      //         userSelectors: [],
      //         rejectNodes: []
      //       },
      //       {
      //         id: "d75d8701-762b-6965-d131-163d2a41d1ae",
      //         name: "结束",
      //         type: "End",
      //         left: "257px",
      //         top: "436px",
      //         ico: "el-icon-finished",
      //         state: "success",
      //         isWaitingAllUser: false,
      //         userSelectors: [
      //           {
      //             selectorId: "",
      //             selectorName: "",
      //             parameter: "",
      //             description: "",
      //             handleType: 0
      //           }
      //         ],
      //         rejectNodes: [
      //           {
      //             nodeId: "d55745b5-e8f8-fea0-278c-ebc70fb71fa6",
      //             nodeName: "",
      //             conditions: [
      //               {
      //                 conditionId: "selectorC",
      //                 conditionName: "",
      //                 parameter: "sdfsd",
      //                 description: "gfg"
      //               },
      //               {
      //                 conditionId: "selectorC",
      //                 conditionName: "",
      //                 parameter: "s'ds'd",
      //                 description: "sdf"
      //               }
      //             ]
      //           }
      //         ]
      //       }
      //     ],
      //     lineList: [
      //       {
      //         from: "d55745b5-e8f8-fea0-278c-ebc70fb71fa6",
      //         to: "d75d8701-762b-6965-d131-163d2a41d1ae",
      //         label: "条件",
      //         conditions: [
      //           {
      //             conditionId: "selectorB",
      //             conditionName: "",
      //             parameter: "sdf",
      //             description: "sdfs"
      //           },
      //           {
      //             conditionId: "selectorA",
      //             conditionName: "",
      //             parameter: "sdfsd",
      //             description: "dfsdf"
      //           }
      //         ]
      //       }
      //     ]
      //   },
      activeLine: {
        from: "",
        to: ""
      },
      nodeTypeMap: {
        Begin: 0,
        End: 1,
        Normal: 2,
        Judge: 3,
        Sign: 4
      },
      workflowId: {}
    };
  },
  // 一些基础配置移动该文件中
  mixins: [easyFlowMixin],
  components: {
    draggable,
    flowNode,
    nodeMenu,
    FlowInfo,
    FlowNodeForm,
    FlowHelp
  },
  directives: {
    flowDrag: {
      bind(el, binding, vnode, oldNode) {
        if (!binding) {
          return;
        }
        el.onmousedown = e => {
          if (e.button == 2) {
            // 右键不管
            return;
          }
          //  鼠标按下，计算当前原始距离可视区的高度
          let disX = e.clientX;
          let disY = e.clientY;
          el.style.cursor = "move";

          document.onmousemove = function(e) {
            // 移动时禁止默认事件
            e.preventDefault();
            const left = e.clientX - disX;
            disX = e.clientX;
            el.scrollLeft += -left;

            const top = e.clientY - disY;
            disY = e.clientY;
            el.scrollTop += -top;
          };

          document.onmouseup = function(e) {
            el.style.cursor = "auto";
            document.onmousemove = null;
            document.onmouseup = null;
          };
        };
      }
    }
  },
  mounted() {
    this.jsPlumb = jsPlumb.getInstance();

    this.keyCodeForEvent();
  },
  methods: {
    loadNodeData() {
      this.$nextTick(() => {
        debugger;
        // 默认加载流程A的数据、在这里可以根据具体的业务返回符合流程数据格式的数据即可
        this.dataReload(this.nodeData);
      });
    },
    // 返回唯一标识
    getUUID() {
      return Math.random()
        .toString(36)
        .substr(3, 10);
    },
    newGuid() {
      var guid = "";
      for (var i = 1; i <= 32; i++) {
        var n = Math.floor(Math.random() * 16.0).toString(16);
        guid += n;
        if (i == 8 || i == 12 || i == 16 || i == 20) guid += "-";
      }
      return guid;
    },
    jsPlumbInit() {
      let _this = this;
      this.jsPlumb.ready(() => {
        // 导入默认配置
        this.jsPlumb.importDefaults(this.jsplumbSetting);
        // 会使整个jsPlumb立即重绘。
        this.jsPlumb.setSuspendDrawing(false, true);
        // 初始化节点
        this.loadEasyFlow();
        // 单点击了连接线, https://www.cnblogs.com/ysx215/p/7615677.html
        this.jsPlumb.bind("click", (conn, originalEvent) => {
          this.activeElement.type = "line";
          this.activeElement.sourceId = conn.sourceId;
          this.activeElement.targetId = conn.targetId;
          this.$refs.nodeForm.lineInit({
            from: conn.sourceId,
            to: conn.targetId,
            label: conn.getLabel(),
            conditions: this.getConditionsOfLine(conn.sourceId, conn.targetId)
          });
          debugger;
          var activeLine = { from: conn.sourceId, to: conn.targetId };
          if (
            _this.activeLine.from != activeLine.from ||
            _this.activeLine.to != activeLine.to
          ) {
            _this.resetOldLineStyle();
            _this.activeLine = activeLine;
            //新增，点击线条更改线条样式
            conn.setPaintStyle({ stroke: "lightgray", strokeWidth: 3 });
            console.log(this.jsplumbConnectOptions);
          }
        });
        // 连线
        this.jsPlumb.bind("connection", evt => {
          let from = evt.source.id;
          let to = evt.target.id;
          if (this.loadEasyFlowFinish) {
            this.data.lineList.push({
              from: from,
              to: to,
              label: "",
              conditions: []
            });
          }
        });

        // 删除连线回调
        this.jsPlumb.bind("connectionDetached", evt => {
          this.deleteLine(evt.sourceId, evt.targetId);
        });

        // 改变线的连接节点
        this.jsPlumb.bind("connectionMoved", evt => {
          this.changeLine(evt.originalSourceId, evt.originalTargetId);
        });

        // 连线右击
        this.jsPlumb.bind("contextmenu", evt => {
          console.log("contextmenu", evt);
        });

        // 连线
        this.jsPlumb.bind("beforeDrop", evt => {
          let from = evt.sourceId;
          let to = evt.targetId;
          // if (from === to) {
          //   this.$message.error("节点不支持连接自己");
          //   return false;
          // }
          if (this.hasLine(from, to)) {
            this.$message.error("该关系已存在,不允许重复创建");
            return false;
          }
          // if (this.hashOppositeLine(from, to)) {
          //   this.$message.error("不支持两个节点之间连线回环");
          //   return false;
          // }
          this.$message.success("连接成功");
          return true;
        });

        // beforeDetach
        this.jsPlumb.bind("beforeDetach", evt => {
          console.log("beforeDetach", evt);
        });
        this.jsPlumb.setContainer(this.$refs.efContainer);
      });
    },
    // 加载流程图
    loadEasyFlow() {
      // 初始化节点
      for (var i = 0; i < this.data.nodeList.length; i++) {
        let node = this.data.nodeList[i];
        // 设置源点，可以拖出线连接其他节点
        this.jsPlumb.makeSource(
          node.id,
          lodash.merge(this.jsplumbSourceOptions, {})
        );
        // // 设置目标点，其他源点拖出的线可以连接该节点
        this.jsPlumb.makeTarget(node.id, this.jsplumbTargetOptions);
        if (!node.viewOnly) {
          this.jsPlumb.draggable(node.id, {
            containment: "parent",
            stop: function(el) {
              // 拖拽节点结束后的对调
              console.log("拖拽结束: ", el);
            }
          });
        }
      }
      // 初始化连线
      for (var i = 0; i < this.data.lineList.length; i++) {
        let line = this.data.lineList[i];
        var connParam = {
          source: line.from,
          target: line.to,
          label: line.label ? line.label : "",
          connector: line.connector ? line.connector : "",
          anchors: line.anchors ? line.anchors : undefined,
          paintStyle: line.paintStyle ? line.paintStyle : undefined
        };
        this.jsPlumb.connect(connParam, this.jsplumbConnectOptions);
      }
      this.$nextTick(function() {
        this.loadEasyFlowFinish = true;
      });
    },
    // 设置连线条件
    setLineLabel(from, to, label, conditions) {
      var conn = this.jsPlumb.getConnections({
        source: from,
        target: to
      })[0];
      if (!label || label === "") {
        conn.removeClass("flowLabel");
        conn.addClass("emptyFlowLabel");
      } else {
        conn.addClass("flowLabel");
      }
      conn.setLabel({
        label: label
      });
      this.data.lineList.forEach(function(line) {
        if (line.from == from && line.to == to) {
          line.label = label;
          line.conditions = conditions;
        }
      });
    },
    // 删除激活的元素
    deleteElement() {
      if (this.activeElement.type === "node") {
        this.deleteNode(this.activeElement.nodeId);
      } else if (this.activeElement.type === "line") {
        this.$confirm("确定删除所点击的线吗?", "提示", {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        })
          .then(() => {
            var conn = this.jsPlumb.getConnections({
              source: this.activeElement.sourceId,
              target: this.activeElement.targetId
            })[0];
            this.jsPlumb.deleteConnection(conn);
          })
          .catch(() => {});
      }
    },
    // 删除线
    deleteLine(from, to) {
      this.data.lineList = this.data.lineList.filter(function(line) {
        if (line.from == from && line.to == to) {
          return false;
        }
        return true;
      });
    },
    // 改变连线
    changeLine(oldFrom, oldTo) {
      this.deleteLine(oldFrom, oldTo);
    },
    // 改变节点的位置
    changeNodeSite(data) {
      for (var i = 0; i < this.data.nodeList.length; i++) {
        let node = this.data.nodeList[i];
        if (node.id === data.nodeId) {
          node.left = data.left;
          node.top = data.top;
        }
      }
    },
    /**
     * 拖拽结束后添加新的节点
     * @param evt
     * @param nodeMenu 被添加的节点对象
     * @param mousePosition 鼠标拖拽结束的坐标
     */
    addNode(evt, nodeMenu, mousePosition) {
      var screenX = evt.originalEvent.clientX,
        screenY = evt.originalEvent.clientY;
      let efContainer = this.$refs.efContainer;
      var containerRect = efContainer.getBoundingClientRect();
      var left = screenX,
        top = screenY;
      // 计算是否拖入到容器中
      if (
        left < containerRect.x ||
        left > containerRect.width + containerRect.x ||
        top < containerRect.y ||
        containerRect.y > containerRect.y + containerRect.height
      ) {
        this.$message.error("请把节点拖入到画布中");
        return;
      }
      left = left - containerRect.x + efContainer.scrollLeft;
      top = top - containerRect.y + efContainer.scrollTop;
      // 居中
      left -= 85;
      top -= 16;
      var nodeId = this.newGuid();
      // 动态生成名字
      var origName = nodeMenu.name;
      var nodeName = origName;
      var index = 1;
      while (index < 10000) {
        var repeat = false;
        for (var i = 0; i < this.data.nodeList.length; i++) {
          let node = this.data.nodeList[i];
          if (node.name === nodeName) {
            nodeName = origName + index;
            repeat = true;
          }
        }
        if (repeat) {
          index++;
          continue;
        }
        break;
      }
      var node = {
        id: nodeId,
        name: nodeName,
        type: nodeMenu.type,
        left: left + "px",
        top: top + "px",
        ico: nodeMenu.ico,
        state: "success",
        isWaitingAllUser: false, //是否等待所有用户
        userSelectors: [],
        rejectNodes: []
      };
      /**
       * 这里可以进行业务判断、是否能够添加该节点
       */
      this.data.nodeList.push(node);
      this.$nextTick(function() {
        this.jsPlumb.makeSource(nodeId, this.jsplumbSourceOptions);
        this.jsPlumb.makeTarget(nodeId, this.jsplumbTargetOptions);
        this.jsPlumb.draggable(nodeId, {
          containment: "parent",
          stop: function(el) {
            // 拖拽节点结束后的对调
            console.log("拖拽结束: ", el);
          }
        });
      });
    },
    /**
     * 删除节点
     * @param nodeId 被删除节点的ID
     */
    deleteNode(nodeId) {
      this.$confirm("确定要删除节点" + nodeId + "?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
        closeOnClickModal: false
      })
        .then(() => {
          /**
           * 这里需要进行业务判断，是否可以删除
           */
          this.data.nodeList = this.data.nodeList.filter(function(node) {
            if (node.id === nodeId) {
              // 伪删除，将节点隐藏，否则会导致位置错位
              // node.show = false
              return false;
            }
            return true;
          });
          this.$nextTick(function() {
            this.jsPlumb.removeAllEndpoints(nodeId);
          });
        })
        .catch(() => {});
      return true;
    },
    clickNode(nodeId) {
      this.activeElement.type = "node";
      this.activeElement.nodeId = nodeId;
      this.$refs.nodeForm.nodeInit(this.data, nodeId);
      //移除线条状态
      this.resetOldLineStyle();
    },
    // 是否具有该线
    hasLine(from, to) {
      for (var i = 0; i < this.data.lineList.length; i++) {
        var line = this.data.lineList[i];
        if (line.from === from && line.to === to) {
          return true;
        }
      }
      return false;
    },
    // 是否含有相反的线
    hashOppositeLine(from, to) {
      return this.hasLine(to, from);
    },
    nodeRightMenu(nodeId, evt) {
      this.menu.show = true;
      this.menu.curNodeId = nodeId;
      this.menu.left = evt.x + "px";
      this.menu.top = evt.y + "px";
    },
    repaintEverything() {
      this.jsPlumb.repaint();
    },
    // 流程数据信息
    dataInfo() {
      this.flowInfoVisible = true;
      this.$nextTick(function() {
        this.$refs.flowInfo.init();
      });
    },
    // 加载流程图
    dataReload(data) {
      this.easyFlowVisible = false;
      this.data.nodeList = [];
      this.data.lineList = [];
      this.$nextTick(() => {
        data = lodash.cloneDeep(data);
        this.easyFlowVisible = true;
        this.data = data;
        this.$nextTick(() => {
          this.jsPlumb = jsPlumb.getInstance();
          this.$nextTick(() => {
            this.jsPlumbInit();
          });
        });
      });
    },
    // 模拟载入数据dataA
    dataReloadA() {
      this.dataReload(getDataA());
    },
    // 模拟载入数据dataB
    dataReloadB() {
      this.dataReload(getDataB());
    },
    // 模拟载入数据dataC
    dataReloadC() {
      this.dataReload(getDataC());
    },
    // 模拟载入数据dataD
    dataReloadD() {
      this.dataReload(getDataD());
    },
    // 模拟加载数据dataE，自适应创建坐标
    dataReloadE() {
      let dataE = getDataE();
      let tempData = lodash.cloneDeep(dataE);
      let data = ForceDirected(tempData);
      this.dataReload(data);
      this.$message({
        message: "力导图每次产生的布局是不一样的",
        type: "warning"
      });
    },
    zoomAdd() {
      if (this.zoom >= 1) {
        return;
      }
      this.zoom = this.zoom + 0.1;
      this.$refs.efContainer.style.transform = `scale(${this.zoom})`;
      this.jsPlumb.setZoom(this.zoom);
    },
    zoomSub() {
      if (this.zoom <= 0) {
        return;
      }
      this.zoom = this.zoom - 0.1;
      this.$refs.efContainer.style.transform = `scale(${this.zoom})`;
      this.jsPlumb.setZoom(this.zoom);
    },
    // 下载数据
    downloadData() {
      this.$confirm("确定要下载该流程数据吗？", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
        closeOnClickModal: false
      })
        .then(() => {
          var datastr =
            "data:text/json;charset=utf-8," +
            encodeURIComponent(JSON.stringify(this.data, null, "\t"));
          var downloadAnchorNode = document.createElement("a");
          downloadAnchorNode.setAttribute("href", datastr);
          downloadAnchorNode.setAttribute("download", "data.json");
          downloadAnchorNode.click();
          downloadAnchorNode.remove();
          this.$message.success("正在下载中,请稍后...");
        })
        .catch(() => {});
    },
    openHelp() {
      this.flowHelpVisible = true;
      this.$nextTick(function() {
        this.$refs.flowHelp.init();
      });
    },
    keyCodeForEvent() {
      let self = this;

      document.getElementById("efContainer").onkeydown = function(e) {
        console.log(e);
        let evn = e || event;
        let key = evn.keyCode || evn.which || evn.charCode;
        debugger;
        if (key === 8 || key === 46) {
          //s  键 + ctrl
          self.deleteElement();
          evn.preventDefault();
        }
      };
    },
    getConditionsOfLine(from, to) {
      return this.data.lineList.filter(
        line => line.from == from && line.to == to
      )[0].conditions;
    },
    resetOldLineStyle() {
      var oldconns = this.jsPlumb.getConnections({
        source: this.activeLine.from,
        target: this.activeLine.to
      });
      this.activeLine = { from: "", to: "" };
      if (oldconns.length == 1) {
        var oldconn = oldconns[0];

        oldconn.setPaintStyle(this.jsplumbSetting.PaintStyle);
      }
    },
    update() {
      var data = {
        drawingInfo: JSON.stringify(this.data),
        workflowId: this.workflowId,
        workflowLines: [],
        workflowNodes: []
      };
      this.data.nodeList.forEach(node => {
        node.nodeType = this.nodeTypeMap[node.type];
        data.workflowNodes.push(node);
      });
      this.data.lineList.forEach(line => {
        line.name = line.label;
        line.fromNodeId = line.from;
        line.toNodeId = line.to;
        data.workflowLines.push(line);
      });
      console.log(data);
      this.$emit("update", data);
    }
  }
};
</script>
